Sir Mick, whose hits include (I Can’t Get No) Satisfaction, retains his affection for Boris Johnson, though. “I got an email message from Sir Mick Jagger congratulating me on winning the mayoral race,” says Johnson. “It is not impossible that I could pay him back and offer to dance with him on stage.”

Hang about, though - the Stones famously arrange their tours to avoid having to pay too much tax in the UK. Isn't that the sort of aggressive tax "avoidance" that the Tories are supposed to be decrying?